Hello Everyone,
I am looking to automate by home, in terms of Lighting & sensors, but the problem is that i am layman in terms of Automation.
Can anyone please assist / guide me on the above concern raised regarding Home Automation.

That is not exactly true. Automation solutions come in both wired and wireless options. The wired would require some electrical and drilling work, but the wireless options usually retrofit well without needing anything or altering the aesthetics of the home (or office). Like any other situation, wired is more reliable and consistent, but wireless options are catching up.